Standoff post with downwardly convex base



FIG. 1 is a perspective view of a standoff post with downwardly convex base, showing the top, front and right sides thereof;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a standoff post with concave base, as shown. 